- sign on the dotted line
- sign on the dotted line1. Lit. to indicate one's agreement or assent by placing one's signature on a special line provided for that purpose. (The line may be solid or dotted.) •
I agreed to the contract, but I haven't signed on the dotted line yet.
•When you have signed on the dotted line, please give me a call.
2. Fig. to indicate one's agreement to something. •Okay. I agree to your terms. I'll sign on the dotted line.
•He is thinking favorably about going with us to Canada, but he hasn't signed on the bottom line.
* * *{v. phr.} To attach one's signature on an important document, such as a contract, a bill of sales, etc. * /The seller said to the buyer, "All you need to do is sign on the dotted line."/
Dictionary of American idioms. 2013.